I’ve always used speedtest.net or speedtest.comcast.net etc to test the speed of my internet connection. Unfortunately this requires a browser that supports java/flash/html5/images etc. What about my linux based servers without a GUI?
Author Sivel made speedtest.cli in python. https://github.com/sivel/speedtest-cli
wget -O speedtest-cli https://raw.github.com/sivel/speedtest-cli/master/speedtest_cli.py
chmod +x speedtest-cli
./speedtest-cli
So we moved a RHEL6.x server from one colocation to another. Unfortunately since RHEL 6, Redhat decided to include network manager by default. This makes for some fun times when trying to manually change IP information.
Another unfortunate was that the uninstaller of the system failed to document where each ethernet cable was connected. We needed 2x LAN LACP, 1x backup, 1x IPMI. The IPMI was easy, but this server had 4 onboard gig ports and 2 pcie riser gig ports to contend with. And both sets were BCM drivers – Broadcom.
Network manager was less than helpful in telling me which ports to plug into. NM was showing eth4 (configured), eth5, eth6, eth7 (configured), eth8, eth9. WTF.
I needed to find out which ethernet devices were active now that I plugged them in.
ip link show
Showed me all of the interfaces, physical addresses, and if it was up or down (connect)
From there I learned that eth9 was now LAN and eth7 was backup – so I could edit the network files to change those.
NM, however, had different plans. Since the eth4 was still configured with the old IP range, routing wasn’t happy when I tried to access said range over the MPLS.
ifdown eth4
Error: Device ‘eth4’ (/org/freedesktop/NetworkManager/Devices/4) disconnecting failed: This device is not active.
F YOU!
ip link set dev eth4 down
or
ifconfig eth4 down
Worked much better.
We recently rolled out an image for Windows 8.1 for corporate use. Unfortunately some of the products that I use require .net 2.0+ to be installed. I remember from my Win7 days that I can simply go to Programs and Features, and then turn Windows features on or off, then select .net framework 3.5 (includes 2.0 and 3.0).
Unfortunately I was receiving the following error:
0x800f0906: “Windows couldn’t connect to the Internet to download necessary files. Make sure that you’re connected to the Internet, and click Retry to try again.â€
0x800F081F: “The changes could not be completed. Please reboot your computer and try again.â€
Dang. Work around (Thanks J3 and http://msdn.microsoft.com/en-us/library/hh506443(v=vs.110).aspx)
Mount the Windows Installation Image
Either pop in your windows 8.1 CD or double click on the ISO (running Windows 8+ allows you to mount ISO by double clicking, win7- needs some sort of ISO mounting kit)
Command Line Install
Open a command prompt with Admin credentials (run as admin if necessary)
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs
Explanation Of Arguments
/Online targets the operating system you’re running (instead of an offline Windows image).
/Enable-Feature /FeatureName:NetFx3 specifies that you want to enable the .NET Framework 3.5.
/All enables all parent features of the .NET Framework 3.5.
/LimitAccess prevents DISM from contacting Windows Update.
/Source specifies the location of the files needed to restore the feature (in this example, the D:\sources\sxs directory).
Running rancid for all of our cisco gear is pretty nice, but we’re acquiring more and more non-cisco (dell/F10) switches for our iSCSI 10Gb and 40Gb needs. Price is a major contributor to that shift.
Anyway, we needed to add Dell PowerConnect 8132 and 8132F switches to the monitor.
This is geared towards the Debian/Ubuntu install I did in an earlier post. Files are from GIT (https://github.com/dotwaffle/rancid-git/tree/master/bin)
Download the required bin files
cd /var/lib/rancid/bin
wget http://it.thelibrarie.com/utilities/dlogin
wget http://it.thelibrarie.com/utilities/drancid
chmod +x dlogin
chmod +x drancid
Edit the Rancid manufacturer file
nano rancid-fe
Under %vendortable add the Dell brand
'dell' => 'drancid',
Save and Exit
Open your router.db file
nano /var/lib/rancid/IMO/router.db
Set your switch in the database
your.dell.switch:dell:up
Save and Exit
Either run rancid or wait until your cron job kicks off
sudo -u rancid -H /usr/bin/rancid-run
****EDIT 4/2/14****
So I ran the dlogin/drancid against one of my Dell switches and was receiving the following error in my /var/log/rancid/newestfilehere:
exec failed router manufacturer dell: No such file or directory
Dang, that’s no good.
cd /var/lib/rancid/bin
./dlogin IPADDRESS_OR_NAME_OF_DEVICE
-bash: ./dlogin: @EXPECT_PATH@: bad interpreter: No such file or directory
Well that solves that issue.
nano /var/lib/rancid/bin/dlogin
Add this to the very top:
#!/usr/bin/env expect
Save and quit
./dlogin IPADDRESS_OR_NAME_OF_DEVICE
root@rancid:/var/lib/rancid/bin# ./dlogin fp-dell8132sw1
fp-dell8132sw1
spawn ssh -c 3des -x -l dellsw fp-dell8132sw1
The authenticity of host ‘fp-dell8132sw1 (10.20.209.000)’ can’t be established.
RSA key fingerprint is 0b:05:08:c1:00:e9:00:30:0d:00:00:00:00:00:00:00.
Are you sure you want to continue connecting (yes/no)?
Host fp-dell8132sw1 added to the list of known hosts.
yes
Warning: Permanently added ‘fp-dell8132sw1,10.20.209.000’ (RSA) to the list of known hosts.
dellsw@fp-dell8132sw1’s password:FP-DELL8132SW1>enable
Password:********
Success!
And make sure you do the same to @PERLV_PATH@: bad interpreter: No such file or directory
nano /var/lib/rancid/bin/drancid
Add the following to the top of the file
#!/usr/bin/perl -w
Save and close
./drancid to verify
EDIT!!!
apparently my hosting company doesn’t like me having perl, python, or other scripts laying around in a directory with no index page. So here’s the tarball of the files:
Tarball of 3 files
Installed BYOBU (easier for me to use than screen) on my security-onion
(http://blog.securityonion.net/2012/02/byobu-and-security-onion.html)
apt-get install byobu
Execute byobu
byobu
F9 and set Byobu to launch automatically
Configuration (Pre-12.04 Ubuntu)
byobu-config
Toggle status notifications
Scroll down space bar to disable the logo
Tab to apply and then exit
Configuration (12.04 and later Ubuntu)
byobu-select-backend
Select Screen
Using BYOBU
Control + a = start of menu (F9 for more settings)
Control + a, c = create a new screen
Control + a + a = last screen used
Control + a, 0 = screen 0
Control + a, 3 = screen 3
On this site I run weblog with automatic updates enabled. I noticed, about a week or so ago, that I saw the following at the top of all of my pages:
define( ‘WPCACHEHOME’, ‘/home/bsdman/it.thelibrarie.com/weblog/wp-content/plugins/wp-super-cache/’ ); //Added by WP-Cache Manager
Well that’s less than fun, but I don’t really care enough to fix it. Unless that’s also screwing with the CSS and making it difficult to see the entire article under the theme I use… The scroll bar was present, but the bottom of the page cut off a lot of the instructions. Awesome.
Lots of searching and I find out that member “stealingsand” is very helpful. http://wordpress.org/support/topic/warning-wp-super-cache-caching-broken-the-script-advanced-cachephp-could-not
I performed the following:
SSH into your box
nano /weblog/wp-config.php
define( ‘WPCACHEHOME’, ‘/home/bsdman/it.thelibrarie.com/weblog/wp-content/plugins/wp-super-cache/’ ); //Added by WP-Cache Manager
This was listed at the top instead of after the ?php section. I just moved it down with the other defines, saved, and exited. Fixed!
On a development Oracle environment we were running Oracle (RHEL 6.x) on a Dell PowerEdge R510 server and connected via iSCSI to a SuperMicro NAS (Nas4Free 9.1.x) on a bonded 1Gb ethernet switch (LACP on Cisco). We then changed out the one SuperMicro NAS for an updated and larger NAS and reconnected to the Oracle environment. Unfortunately we also saw attempts to contact the old/retired NAS on iSCSI.
View all iSCSI sessions
iscsiadm -m session
tcp: [2] 10.10.0.137:3260,1 iqn.2013.us.temp.zfs.freenas1:disk0
tcp: [3] 10.10.0.138:3260,1 iqn.2014.us.temp.zfs.freenas2:disk0
Logout of an iSCSI connection
iscsiadm -m node --targetname "iqn.2014.us.temp.zfs.freenas2:disk0" --logout
Logging out of session successful
Discover all available iSCSI on a host
iscsiadm -m discovery -t st -p IPADDRESSOFHOST_ORGROUP
Login to all discovered iSCSI
iscsiadm -m node --loginall=all
Login to specific iSCSI target
iscsiadm -m node -T FQN_IQN:DISK_NUMBER -l -p IPADDRESSOFHOST_ORGROUP